Design and manufacture:API594 Face to face and end to end:API594, Pressure-temperature rating:ASME B16.34 Inspection and test: API598 Pipe flange: ASME B16.5
Product Range
Body material: C95800
Nominal diameter:14″
End Connection: Wafer
Pressure range: 150LB
Working temperature:-196℃~+560℃
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Kindly, please find the attached valve pictures.
STV Valve Technology Group Co., Ltd DATED MAY 19, 2023
The check valve is mainly used to prevent the backflow of medium, reverse rotation of pump and drive motor, and discharge of container medium. The check valve can also be used to feed the auxiliary system whose pressure may rise above the system pressure.
Check valves are commonly used in our lives. What is the role of check valves?
Brief introduction of check valve
Check valve refers to a kind of valve whose opening and closing parts are round discs and whose action is generated by its own weight and medium pressure to block the backflow of medium. The structure of check valve can be divided into three categories, namely lifting check valve, swing check valve and butterfly check valve. Function of check valve
The check valve is mainly used to prevent the backflow of medium, reverse rotation of pump and drive motor, and discharge of container medium. The check valve can also be used to feed the auxiliary system whose pressure may rise above the system pressure. The check valve can be divided into swing check valve (rotating according to the center of gravity) and lift check valve (moving along the axis). Working principle of check valve
The check valve opens under the action of fluid pressure flowing in one direction; When the fluid flows in the opposite direction, the fluid pressure and the self reclosing valve disc of the valve disc act on the valve seat to cut off the flow. The check valve belongs to this type of valve, which includes swing check valve and lift check valve. The swing check valve has a hinge mechanism, and a valve flap like a door freely rests on the inclined valve seat surface. In order to ensure that the valve clack can reach the proper position of the valve seat surface each time, the valve clack is designed in the hinge mechanism, so that the valve clack has enough swing space, and the valve clack really and comprehensively contacts the valve seat.
STV VALVE offer Check Valve, Single Disc Check Valve CLASS 150, Single Disc Swing Check Valve, single disc swing check valve(forging body), Single Disc Wafer Swing Check Valve, Single Plate Wafer Check Valves, Thin Type Swing Check Valve, Thin Type Wafer Check Valve, Wafer Check Valve, Wafer Type Single Disc Swing Check Valve.
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VALVE:CHECK;STEEL, 300DIAX180MM L, WAFER TYPE QNSI SER#150 DBL DISC 316+EPDM SEAT APPLICATION: POTABLE WATER MFR: STV CORPORATION OR EQUIVALENT” NOTE: SEAT MATERIAL: TO BE ADVISEDHS:848180409 0
The WAFER check valve refers to a valve that automatically opens and closes the valve flap by means of the flow of the medium itself, and is used to prevent the back flow of the medium, which is also called a check valve, a check valve, a reverse flow valve, and a back pressure valve. The check valve is an automatic valve whose main function is to prevent backflow of the medium, prevent the pump and drive motor from reversing, and discharge the container medium. The check valve can also be used to supply a line in which the pressure may rise to an auxiliary system that exceeds the system pressure. The check valve can be mainly divided into a swing type check valve (rotation according to the center of gravity) and a lift check valve (moving along the axis)
working principle
The function of this type of valve is to allow only the medium to flow in one direction and to prevent the flow in the opposite direction. Usually, the valve is automatically operated, and the valve flap is opened by the fluid pressure flowing in one direction; when the fluid flows in the opposite direction, the fluid pressure and the self-reclosing valve flap of the valve disc act on the valve seat to cut off the flow.
Among them, the stainless steel wafer type check valve belongs to this type of valve, and includes a swing type check valve and a lift check valve. The swing check valve has a hinge mechanism and a door-like flap that rests freely against the inclined seat surface. In order to ensure that the valve flap can reach the proper position of the valve seat surface each time, the valve flap is designed in the hinge mechanism, so that the valve flap has enough swinging space and the valve flap is truly and comprehensively in contact with the valve seat. The flaps can all be made of metal, or they can be inlaid with leather, rubber, or synthetic coverings depending on the performance requirements. With the swing-open check valve fully open, the fluid pressure is almost unimpeded, so the pressure drop across the valve is relatively small. The valve flap of the lift check valve is located on the valve seat sealing surface of the valve body. In addition to the flap being free to lift and lower, the valve is like a shut-off valve. The fluid pressure causes the flap to lift from the seat sealing surface. The backflow of the medium causes the flap to fall back onto the seat and shut off the flow. Depending on the conditions of use, the flap can be of all metal construction or it can be in the form of a rubber or rubber ring on the valve disc holder. Like the shut-off valve, the passage of fluid through the lift check valve is also narrow, so the pressure drop through the lift check valve is larger than that of the swing check valve, and the flow rate of the swing check valve is limited. Very few].
Technical Parameters Nominal pressure or pressure level: PN1.0-16.0MPa, ANSI CLASS 150-900, JIS10-20K Nominal diameter or caliber: DN15～900, NPS 1/4～36 Connection method: flange, butt welding, thread, socket welding, etc. Applicable temperature: -196 ° C ~ 540 ° C Body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (304L), CF8M (316), CF3M (316L), Ti. Different materials can be used for water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.
